Frank Lloyd Wright trained architect Edgar Tafel is responsible for the original Usonian house in this design. Constructed in 1948, it is a flat roofed house with a typical Usonian layout: Public living spaces and private sleeping spaces each given their own wing. The house's Southern exposure is open to the private Garden, with all glass walls in the living spaces. At the point of inflection between the two wings, a large fireplace marks the spiritual "center" of the home.The addition is in two parts: one private and attached to the sleeping wing, the other public and attached to the living spaces. A series of "flying walkways" melds the two new wings into a whole. The walkways also define different areas of the enclosed garden zones between the new wings.